Air gun



Dec. 7, 1937. w. c. ROBINSON AIR GN 2 Sheets-Sheet l Filed June 12, 1936INVENTOR. W. C. FOB/NSO/V x ATTOR EY.

Dec. 7, 1937. w. c. ROBINSON AIR GUN Filed June l2, 1936illlllllllillllIrlirllllflllflllt QTL R. v.U AON \E mw N E o WW, n 1 A mhm W ...wm 1X Y B N s Patented Dec. 47, 1937 UNITED vSTATES PATENTori-ics 12 Claims.

This invention relates to air guns.

The general object of the invention is to provide an improved air gunwhich is capable of shooting hard and accurately and which is of such anature that it will not get out of order readily. v

Another object of the invention is to provide a novel shot magazine anddeliverydevice for an a1r gun.

an air gun having novel means for advancing a bullet to dischargeposition.

A further object of the invention is to provide a novel trigger releasefor an air gun.

Another object of the invention is to provide a novel pump means for thestorage-reservoir of a repeating air gun.

Another object of the invention is to provide an improved air gunwherein a plurality of pellets 20 can be expelled therefrom merelypulling and releasing the ring trigger.

Another object of the invention is to provide an air gun including meanswherebythe action of pulling and releasing the ring trigger ex- 25 pellsa pellet from the ring barrel and reloads.

l Other objects and the advantages of the inventi'on will be apparentfrom the following description taken in connection with theaccompanying' drawings, wherein: i

Fig. 1 is a side elevation of an air ri'e embodying the features 'of myinvention showing the rifle mounted on a tripod;

Fig. 2 is a front elevation of the air rifle;

Fig. 3 is a section taken online 3-3 of Fig. 2; 35 Fig. 4 is a sectiontaken on line 4-4 of Fig. 3; Fig. 5 is a'section taken on line 5-5 ofFig. 3; Fig. 6 is a section taken on line 6-6 of Fig. 3; Fig. '7. is asection taken on line 'l-'I of Fig. 3; Fig. 8 is a section taken on line8 8 of Fig. 4; 40 Fig. 9 is a section taken on line 9--9 of Fig. 8; Fig.10 is a section taken on line III- I0 of Fig. 4;

Fig. 11 is a section taken on line II-II Fig. 1; l

Fig. l2 is a view similar to Fig. 10 showing the parts in a firedposition; i

Fig. 13 i-s a section taken on line I3I3 of Fig.

3; and

Fig. 14 is a fragmentary section taken on line 50 I4-I4 of Fig. 13.

Referring to the drawings by reference character have shown my inventionas embodied in an air gun which is indicated generally at I0.

As shown the air gun includes a'stock II and a` 55 barrel I2. "Ihe stockincludes a grip portion II' Another object of the invention is'toprovide which is shown as of the pistol grip type and has a centralchamber I3 and upper and lower forwardly projecting portions I4 and I5.

The portion I5 is mounted upon the under side of an air reservoir 'I6which is connected to the barrel I2 as by soldering and is preferablycylindrical and includes a front wall I1, a rear wall I8 and which has alower aperture I3 therein in which I mount a closure 20.

The closure is cup-shaped in cross section and has a cylinder 2| fittedtherein which communicates through an aperture 22 with the interior ofthe reservoir I6. lThe aperture 22 is normally closed by a valve 23which is urged to its seat by a spring 24. Within the cylinder 2I I showa piston 25 which has a piston rod 26 secured thereto and which isconnected by a link 21 with an operating member 28 which is pivoted asat 29to the side wall of the closure 20. The construction is such thatwhen the lever 28 is moved back and forth the pump will operate tocharge the reservoir I6. When not in use the lever 28 is moved withinthe lower portion of the closure 20 and is secured in place as by a clip30, as clearly shown by the broken lines in Fig. 3.

The rear end I8 of the reservoir is provided with an innating valve 3Iwhich may be a tire valve and with a gauge 32 which indicates thepressure within the reservoir.

The upper portion I4 of the stock includes a part 33 which engages thetop of the reservoir and includes a depending portion '34 which engagesthe rear member I8 of the reservoir. Between the portion 34 and the gripIl the stock includes acut away portion 35. Adjacent the top thereof thestock II has a threaded 4aperture 36 therein (see Fig. 8) one end ofwhich opens into the cut away portion 35 and the opposite endinto thechamber I3. At the opposite side of the chamber I3 the stock has arecess 36 therein which opens into the chamber I3 and includes a valveseat portion 36". the recess 36 the stock has a reduced recess 36atherein.

Furthermore, adjacent the top the stock II hasa conduit 31 therein, oneend of. which opens Opening into into the recess 36 and the opposite endcomwhich opens into the cut away portion 35 and the opposite end intothe chamber 38. Fixed in the aperture 39 and suitably secured to thestock I provide a tube 4Ilwhich extends into the cut away portion 35 apredetermined distance. Positioned in the threaded aperture 36 I providea threaded valve plug 4| which has a recess 42 therein which opens intothe chamber I3 and' has a plurality of radial apertures 43 therein whichat one end open into the recess 42 and at the opposite end open into thechamber 38. Furthermore, the plug 4I has a reduced aperture 44 thereinwhich is concentric with the recess 42.

'I'he inner end of the plug is concave to form a valve seat 45.Positioned in the aperture 44 of the plug 4I I provide a stem 46 whichat one end extends a predetermined distance into the cut away 35 and theopposite end is positioned in the aperture 36a. Positioned in theaperture 36a between the end thereof and the end of the stem 46 Iprovide a coiled spring 41. Intermediate the length thereof the stem 46has a valve member 48 thereon which includes opposed frustoconical valvefaces 48 and 50. Normally the spring 41 retains the valve face 48 inengagement with the valve seat 45 of the plug 4I to restrif't passagewayfrom the chamber I3 into the plug recess 42.

The barrel I2 includes an outer cylindrical member 5| which projectsbeyond the front I1 of the reservoir and the top portion of whichprojects beyond the rear portion I8 of the reservoir and is fittedwithin an arcuate groove 52 in the stock II as shown in Fig. 8. Thelower portion of the barrel I2 terminates at 53 (see Fig. 3) abuttingthe stock portion 33. Within the barrel I2 I mount a rifle barrel 54having a bore 55 therein. The outer end of the barrel 54 terminates ashort iistance from the outer end of the barrel 5| and the inner endterminates at 56 at a location spaced from the stock II.

Secured to the rifle barrel 54 I provide a magazine tube 51. Adjacentthe forward end of the barrel 5I the rifle barrel 54 and the magazinetube 51 are slidably supported in a bearing plug 58 in the barrel 5| andadjacent the opposite end are similarly supported in the portion 33 ofthe stock II. Intermediate the stock portion 33 and the plug 58 the riebarrel 54 and the magazinetube 51 are slidably supported in a plugmember 58.

Adjacent the rear end 56 the rifle barrel 54 has a depending triggermember 66 secured thereto. Forward of the rear end 56 the rifle barrel54 has an aperture'6l (Figs. 10 and 12) therein and the magazine tube 51has a similarly aligned aperture 62 therein. Opposite the aperture 6| aslight depression 61|. is provided in the surface of the bore 55 to holdthe pellet 65 in the bore 55 in position until the gun is red.. The rearend of the magazine tube 51 is closed by a plug'63 having an arcuatefront face 64 which curves towards the rear side of the aperture 62 toguide pellets 65 through the apertures 6I and 62. The forward end of themagazine tube 51 is closed by a plug 66 (see Fig. 12) and positioned inthe magazine tube I provide a follower 61.

In the magazine tube 51 between the plug 66 and the follower 61 Iprovide a coiled spring 68 which urges the follower 61 rearward to forcethe pellets 65 towards and through the apertures 6I and 62. The follower61 has a finger portion 61 thereon which projects out of the magazinetbe 51 through a slot 51' and through the barrel 5I through a slot 5|'(see Figs. 1 and 11).

Suitably anchored to the plug 58 I provide a coiled spring 69 which atthe opposite end is secured as at 10 to the magazine tube plug 66. 'Ihespring 68 normally urges the rifle barrel 54 and the magazine ,tube 51forward until a stop portion 1I on the trigger member 60 engages therear of the stock portion 33.

The tube 46 i's positioned in the bore 55 of the rifle barrel 54 andwhen the rie barrel 54 is fully forward the forward end of the tube 46is positioned in line with the rear of the barrel aperture 6I as clearlyshown in Fig. 10.

The space in the barrel 5| between the plug 58 and the plug 58 isadapted to be used to store a quantity of the pellets 65. To insert thepellets into the barrel 5| the barrel 5| has an elongated slot 12therein which is closed by a slice member 13 (see Figs. 3 and 6).

The forward face of the plug 58 has a conical recess 14 therein (seeFig. 14) which adjacent the magazine tube 51 has a reduced forwardlyprojecting boss 15 therein. The boss 15 has a recess 16 therein the sizeof a pellet 65 and the outer end of the boss is knife-edged coincidentwith the side walls of the recess 16. Adjacent the bottom of the recess16 the magazine tube 51 has an aperture 18 therein` through which thepellets 65 are adapted to pass into the interior thereof.

Between the forward end of the reservoir I6 and the pump I provide acollar member 18 whichv encompasses the reservoir [6 and the barrel 5|vand has a depending grip portion thereon which has a recess 8| therein.

As shown in Figs. 1 andZ a tripod 82 including a hub portion 83 havingan upstanding reduced spindle 84 thereon may be provided to support thegun I8 when desired. The spindle 84 may be pivotally secured to the hub83 as indicated at 85. The spindle 84 is positioned in the aperture 8|of the gun grip 80 and when the gun is thus supported it may be swungabout the spindle 84 and may be tilted on the spindle pivot 85.

In operation the slide member 13 is moved to expose the slot 12 in thebarrel 5| and a quantity of the pellets 65 are put into the barrel 5|through the slot 12 and thereafter the slide member 13 is moved to closethe slot 12. The gun I Il is then held vertical with the front end upand the follower 61 is moved against the action of the spring 68 by thefinger 614 to a position wherein it is above the aperture 18 of themagazine tube 51 as shown in Fig. 14. When the gun is held in thisposition the pellets 65 roll into the conical recess 14 of the `plug 58and into the recess 16 and thence through 'the aperture 18 of themagazine tube into the interior of the magazine tube.

The knifefedgev11of the boss 15 separates the pellets 65 and allows onlyone at a time to enter the recess 16 thereby preventing jamming. After aquantity of pellets 65 are in the magazine tube the follower 61 isreleased whereupon the spring 68 urges the follower and the pellets 65in the magazine tube 51 towards the apertures 6I and 62 and forces oneof the pellets through the apertures 6| and 62 into the bore 55 of therifle barrel 54 as shown in Fig. 10. The clip 3|) is then released andthe operator actuates the pump handle 28 to charge the reservoir I6 withcompressed air.

When the compressed air in the reservoir ,is at a suitable pressure theoperator swings the pump handle into the casing 20 and moves the clip 30to retain it therein. Instead of pumping air into the reservoir I6compressed air may be introduced through the tire valve 3l from aysuitable source of compressed air. When the reservoir I6 is chargedcompressed air flows therefrom.

through the aperture 31', the conduit 31, and the recess 36' into thechamber i3. The gun i0 is nowk ready to beflred.

To iire the gun I0 the trigger is quickly pulled rearwardly. When thetrigger 60 is pulled rearwardly the rifle barrel 54 moves with it. Bythe time the trigger 50 engages the end of the stem i6 the yriiie barrel51 has moved a suilicient .distance so that the tube Mi closes theaperture 6I in the magazine barrel and as the trigger continues to moverearwardly it moves the stem t6 rearwardly. As the stem H6 is movedrearwardly the valve member i8 moves therewith moving the valve face i9out of engagement with the valve seat of the valve plug Ml and uponcontinued rearward movement of the stem d6 the valve face engages thevalve seat portion 36" surrounding the recess 36 thereby restricting thepassage of compressed air into the chamber i3 through the recess 36'.Asc the valve face t9 moves out of engagement with the valve seat .155the compressed air in the chamber i3 passes therefrom through the valveplug recess d2 and apertures Minto the chamber 38 and thence through thetube l0 and forces the pellet 65 forward in the Arifle barrel bore andexpeils it from the barrel.

When the trigger 50 is released the spring 59 moves the rifle barrel 5tforward to its normal position and the spring 68 forces another of thepellets through the apertures 5l and 62 into the bore 55 of the riflebarrel 54. Furthermore, when the trigger is released the spring 36aforces the stem d5 forward thereby moving the valve face 55 out ofengagement with the valve seat '35" and the valve face i9 intoengagement with the valve seat 45. When the valve face 50 moves out; ofengagement with the valve seat 35 compressed air again ows from thereservoir l5 through the aperture 3l', the conduit 31, and the recess 35into the chamber i3.

Thus it will be seen that when a sumcient quantity of compressed air isin the reservoir i5 all the pellets 65 in the magazine tube 51 may befired one after the other by the one operation of repeatedly pulling andreleasing the trigger 50.

From the foregoing description it will be apparent that I have inventeda novel air gun which may be economically manufactured and which ishighly eicient in use.

Having thus described my invention'l claim: 1. An air gun including astock, an air reservoirand an outer barrel secured to said stock,

-said stock having a chamber therein,'means to admit a charge of airinto the chamber, means to discharge a charge of air from the chamber, atube member mounted on said stock and projecting forwardly therefrom,said stock having conduit means therein at one end communicating withsaid tube and at the opposite end communicating with said chamber, arifle barrel slidably mounted on said tube member. a magazine tube -insaid rifle barrel, said rifle barrel having a loading aperturecommunicating with y said magazine tube.

communicating with said chamber, a rifle barrel slidably mounted in saidouter barrel, said tube member being disposed in said riile barrel.

3.-An air gun including a stock, an air reservoir secured to said stock,an outer barrel portion mounted on and secured to said reservoir andsaid stock, means on said reservoir to force air thereinto underpressure, said stock having a chamber'therein, said stock having a pairof opposed recesses opening into said chamber, a valve seat surroundingeach recess, said stock having conduit means therein communicating atone end with the'interior of said reservoir and at the opposite endopening into the rear one of said recesses, a stern member slidablymounted in said stock' coaxial with said recesses, a valve member onsaid stem adapted to control passage through each of said recesses, saidstem projecting forwardly of said stock, a tube member mounted on saidstock and projecting forwardly, said stock having conduit means thereinat one end communicating with said tube and.

at the opposite end opening into said front recess, a rifle barrelslidably mounted in said outer barrel, a magazine tube positioned insaid outer barrel, said rifle barrel and said magazine tube beingsecured together, said rifle barrel having a loading aperturecommunicating with said magazine tube. said tube member being disposedin said rie barrel.

4. An air gun including a stock, an air reservoir secured and an outerbarrel secured to said stock, said stock having a chamber therein, saidstock having a pair of opposed recesses opening into said chamber, avalve seat surrounding said recesses, said stock having conduit meanstherein communicating at one end with the `interior /of said reservoirand at the opposite end opened to engage said valve seat of said frontrecess' and a rear valve face adapted to engage said valve seat of saidrear recess, said stem project- Y ing out of said stock into said cutaway'portion, a vtube member mounted on said stock and projecting` intosaid cut away portion, said stock ,having conduit means therein at oneend communicating with said tube and at the opposite end opening intosaid front recess, a rifle barrel slidably 'mounted vin said outer barl. a magazine tube in said rifle barrel, sai rifle barrel having aloading aperture communicating with said magazine tube. i

5. An air gun including a stock, an air reservoir secured to said stock,an outer barrel portion mounted on and secured to said reservoir andsaid stock, means on said reservoir to force air thereinto underpressure, said stock having a chamber therein, saidstock having a pairof opposed recesses opening into said chamber, a valve seat surroundingeach recess, .said stock having conduitl means therein communicating atyone end with the interior of said reservoir and 'l at the opposite endopening into the rear one ofy said recesses, said stock havingran open.bottomed cut away portiontherein between said grip portion and saidreservoir, a stem member slidably mounted in said stock coaxial withsaid recesses, a valve member on said stem and disposed in said chamber,said valve member including a front valve face adapted to engage saidvalve seat of said front recess and a rear valve face adapted to engagesaid valve seat of said rear recess, said stem projecting out of saidstock into said cut away portion, a tube member mounted on said stockand projecting into said cut away portion, said stock having conduitmeans therein at one end communicating with said tube and at theopposite end opening into said front recess, a rifle barrel slidablymounted in said outer barrel, amagazine tube positioned in said outerbarrel, said rie barrel and said magazine tube being secured together,said riiie barrel having a loading aperture communicating with saidmagazine tube, said tube member being disposed in said rifle barrel.

6. An air gun including a stock, an air reservoir secured to said stock,an outer barrel portion mounted on and secured to said reservoir andsaid stock, means on said reservoir to force air thereinto underpressure, said stock having a chamber therein, said stock having a pairof opposed recesses opening into said chamber, a valve seat surroundingeach of said recesses, said stock having conduit means thereincommunicating at one end with the interior of said reservoir and at theopposite end opening into the rear one of said recesses, said stockhaving an open bottomed cut away portion therein between said gripportion and said reservoir, a stem member slidably mounted in said stockand coaxial with said recesses, a valve member on said stem and disposedin said chamber, said valve member including a front valve face adaptedto engage the valve seat of said front recess and a rear valve faceadapted to engage the valve seat of said rear recess, resilient meansnormally urging said front valve face into engagement with itsassociated valve seat, said stem projecting out of said stock into saidcut away portion, a tube member mounted on said stock and projectinginto said cut away portion, said stock having conduit means therein atone end communicating with said tube and at the opposite end openinginto said front recess, a rifle barre slidably mounted in said outerbarrelja magazine tube positioned in said outer barrel, said riflebarreland said magazine tube being secured together, said rifle barrel havinga loading aperture communicating with said magazine tube, said tubebeing disposed in said rifle barrel and said loading aperture beingexposed when the barrel is in its. forward position.

7. An air gun, said air gun including an outerl barrel, a tube at the.rear end of said outer bard rel, means to supply compressed air to saidtube, a trigger for controlling said means, a riie barrel positioned insaid outer barrel, a magazine tube positioned in said outer barrel, saidrie barrel and said magazine tube being slidably mounted and securedtogether, said riiie barrel having an aperture adjacent the rear thereofand an aligning aperture in said magazine tube, a follower member insaid magazine tube, the ends of said magazine tube being closed, saidrear closure of said magazine tube being shaped to direct pelletsthrough said riiie barrel and tube apertures, said first tube beingpositioned in said rie barrel with the forward end:- thereof "aligned`with the rear edge of said aperture in said rifle barrel, a plug insaid outer barrel having a. conical recess in its forward face and saidmagazine barrel having an aperture therein adjacent the bottom of saidconical recess and a boss extending from the surface of said conicalrecess, said boss having a recess therein into which said secondmagazine tube aperture opens.

8. An air gun, said air gun including an outer barrel, a, tube at therear end of said outer barrel, means to supply compressed air to saidtube, a trigger for controlling said means, a rifle barrel positioned insaid outer barrel, a magazine tube positioned in said outer barrel, saidriiie barrel and said magazine tube being slidably mounted and securedtogether, said rie barrel having an aperture adjacent the rear thereofand an aligning aperture in said magazine tube, a follower member insaid magazine tube, the ends of said magazine tube being closed, saidrear closure of said magazinetube being shaped to direct pellets throughsaid rifle barrel and tube apertures, said first tube being positionedin said rifle barrel with the forward end thereof aligned with the rearedge of said aperture in said rie barrel, a plug in said outer barrelhaving a conical recess in the forward face thereof and said magazinebarrel having an aperture therein adjacent the bottom of said conicalrecess, a boss extending from the surface of said conical recess, saidboss having a recess therein into which said second magazine tubeaperture opens, the outer side walls of said boss being tapered to formaknife edge coincident with the surface of said boss recess.

9. An air gun including an outer barrel, a tube at the rear end of saidouter barrel, means to supplycompressed air to said tube, a trigger forcontrolling said means, a rie barrel positioned in said outer barrel, amagazine tube positioned in said outer barrel, said rifle barrel andsaid magazine tube being secured together, a closure member in saidouter barrel adjacent the forward end thereof and a plug in said outerbarrel intermediate theiength thereof, said rie barrel being slidablymounted in said closure member and said rifle barrel and said magazinetube being slidably mounted in said plug, said riiie barrel having anaperture adjacent the rear thereof and an aligning aperture in saidmagazine tube, a follower member in said magazine tube, the ends of saidmagazine tube being closed, said rear closure of said magazine tubebeing shaped to direct pellets through said rifle barrel i and tubeapertures, means normally urging said follower towards said rifle barreland magazine apertures, means normally urging said riiie barrel and saidmagazine tube forward, said rst tube being positioned in Said rie barrelwith the forward end thereof aligned with the rear edge of said aperturein said rifle barrel, said plug member having a conical recess in theforward face thereof and said magazine barrel having an aperture thereinadjacent the bottom of said conical recess, a boss extending from thesurface of said conical recess, said boss having a recess therein intowhich said second magazine tube` aperture opens, the opter side walls ofsaid boss being tapered to forin a knife edge coincident with thesurface of said boss recess.

10. An air gun including a stock, an air reservoir secured and an outerbarrel secured to said stock, said stock having a chamber therein, saidstock having a pair of opposed recesses opening into said 'chamber` avalve seat surrounding said recesses, `said stockhaving conduit meanstherein communicating at one end with the interior of said' reservoirand at the opposite end opening axial with said recesses, a valve memberon 'said stem and disposed in said chamber, said valve member includinga front valve face adapted to engage said valve seat of s/aid frontlrecess and a lrearvalve face adapted to engage said valve seat of saidrear recess, said stem projecting out of said stock into said cut awayportion, a tube member mounted on said stock and projecting into saidcut away portion,- said stock having conduit means therein at `one endcommunicating with said tube and at the opposite end-opening into saidfront recess',y a rifle barrel slidably mounted in 'said outer barrel, amagazine tube movable in said riiie barrel, said rie barrel having aloading aperture communicating withvsaid magazine tube, said rie barrelhaving an aperture adjacent therear thereof and an aligning apertureinsaid magazine tube, a follower member in said magazine tube, means todirect pellets through said riiie barrel and tube apertures, said firsttube being positioned in said rie barrel with the forward end thereof`"aligned with the rear edge of said aperture in said riiie barrel, saidmagazine barrel having an aperture therein and means to direct pelletsinto said last mentioned aperture.. 1l. An air gun including a stock, anair reservoir and an outer barrel secured to said stock, said stockhaving a. chamber and having a pair 'of opposed recesses opening intothe chamber, a valve seat surrounding Veach recess, said stock havingconduit means therein communicating at one end with theinterior of saidreservoir and at the opposite end opening into the rear recess, saidstock having an open bottomed cut away portion therein between said gripportion and said reservoir, a stem member slidably mounted in said stockcoaxial with said recesses, a valvemember on said stem and disposed insaid chamber, saidv valve member including a front and a rear valve faceadapted to engage said front valve seat and said rear lvalve seat, saidstem project- 'ing out of said stock into said cut away portion, a

tube member mounted .on said stock and pro- Jecting into said cut awayportion, said stock having conduit means therein at one end communi.-cating with said tube and at the opposite end opening into said frontrecess, a rifle barrel slidably mounted in said outer barrel, a magazinetube movable in said rifle barrel, said rifle barrel having a loadingaperture communicating with said magazine tube, said rifle barrel havingan aperture adjacent the rear thereof and an aligning aperture in saidmagazine tube, a'follower member in said magazine tube, the rear of saidmagazine tube having a closure, said closure being shaped to directpellets through said rifle barrel and tube apertures, said rst tubebeing positioned in saidf-rie barrel with the forward end thereofaligned with the rear edge of said aperture in said riiie barrel, a plugin saidouter barrclhaving a recess in the forward face thereof and saidmagazine barrel having an aperture therein adjacent the bottom of saidconical recess and a boss extending from the surface of said `conicalrecess, said boss having a recess therein into which said secondmagazine tube aperture opens. l y

12. In an air gun including a stock and a ring barrel, a magazine tubecontaining a. plurality of pellets and communicating with the barrel,

a member xed on said stock and projecting into said barrel and normallypreventing communi-L cation between the magazine and barrel, means .tomove said barrel relative to the member to open communication betweenthe barrel and the time the trigger is released to cause another pelletto be moved from the magazine tube into said ring barrel.

Y A [WILLIAM C. ROBINSON.

